CN110604414A - Backrest inclining mechanism of seat functional frame - Google Patents
Backrest inclining mechanism of seat functional frame Download PDFInfo
- Publication number
- CN110604414A CN110604414A CN201810619674.8A CN201810619674A CN110604414A CN 110604414 A CN110604414 A CN 110604414A CN 201810619674 A CN201810619674 A CN 201810619674A CN 110604414 A CN110604414 A CN 110604414A
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- backrest
- connecting piece
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- assembly
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- 230000002146 bilateral effect Effects 0.000 claims abstract description 4
- 238000005452 bending Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 9
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 230000005484 gravity Effects 0.000 description 12
- 230000000694 effects Effects 0.000 description 6
- 239000001177 diphosphate Substances 0.000 description 5
- 230000007547 defect Effects 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 239000002131 composite material Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 230000001154 acute effect Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
Classifications
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C7/00—Parts, details, or accessories of chairs or stools
- A47C7/36—Support for the head or the back
- A47C7/40—Support for the head or the back for the back
- A47C7/46—Support for the head or the back for the back with special, e.g. adjustable, lumbar region support profile; "Ackerblom" profile chairs
- A47C7/462—Support for the head or the back for the back with special, e.g. adjustable, lumbar region support profile; "Ackerblom" profile chairs adjustable by mechanical means
Abstract
The invention relates to a backrest inclining mechanism of a seat functional frame, which comprises a first backrest auxiliary component and a second backrest auxiliary component which are arranged on the left side and the right side of a fixed frame and are arranged in a bilateral symmetry manner, wherein the first backrest auxiliary component and the second backrest auxiliary component are respectively positioned at the rear part and the front part of the fixed frame; the first backrest auxiliary assembly comprises a sliding rail and a pulley, the sliding rail is convenient for the backrest assembly to incline and return, the pulley is arranged in the sliding rail, and the second backrest auxiliary assembly comprises an auxiliary connecting piece A, an auxiliary connecting piece B and an auxiliary connecting piece C which are convenient for the backrest assembly to incline and return and are hinged with each other. Compared with the prior art, the first backrest auxiliary assembly and the second backrest auxiliary assembly are respectively arranged at the front part and the rear part of the fixing frame, so that the force which is beneficial to the inclination and the return of the backrest assembly is generated for the front part and the rear part, and the backrest assembly on the functional frames such as a low functional frame, a non-electric functional frame and the like can run smoothly and labor-saving in the inclination, the falling and the return processes.
Description
Technical Field
The invention relates to the technical field of furniture, in particular to a backrest inclining mechanism of a functional frame of a seat.
Background
The problems of unsmooth operation, difficult recovery and the like always exist in the processes of inclining, falling down and recovering of the backrest component in the traditional seat functional frame, and the problems are relatively common, and particularly, the problems are more prominent for a low functional frame, a non-electric functional frame and the like.
For the increasingly strong market demands, the problem is urgently solved, and a mechanism which can enable the functional rack to be smooth and labor-saving in the process of tilting, falling and returning and the backrest assembly on the functional racks such as a low functional rack and a non-electric functional rack besides the traditional functional rack is needed.
As shown in fig. 1 and 2, a functional frame of a conventional seat generally includes a fixed frame 100, a leg rest assembly 200, a seat cushion support assembly 300 and a backrest assembly 400, which are disposed in pairs at left and right sides of the fixed frame 100, wherein front and rear ends of the seat cushion support assembly 300 are respectively hinged to one ends of the leg rest assembly 200 and the backrest assembly 400, and the seat cushion support assembly 300 includes an upper seat cushion support 310, a lower seat cushion support 320, a front seat cushion support 330 and a rear seat cushion support 340, which form a four-bar linkage mechanism.
In order to overcome the defects in the prior art, the invention provides the backrest inclining mechanism of the functional frame of the seat, which is suitable for the backrest components on different functional frames to smoothly and labor-saving operate in the inclining, inclining and returning processes, is convenient for the backrest components to incline, incline and return and also takes into account the change of the height of the backrest.
Disclosure of Invention
The invention overcomes the defects in the prior art and provides the backrest inclining mechanism of the functional frame of the seat, which is suitable for the backrest components on different functional frames to run smoothly and laborsaving in the inclining, inclining and returning processes, is convenient for the backrest components to incline, incline and return and also considers the change of the height of the backrest.
The invention is realized by the following steps:
a backrest inclining mechanism of a seat functional frame comprises a first backrest auxiliary component and a second backrest auxiliary component which are arranged on the left side and the right side of a fixed frame and are arranged in a bilateral symmetry mode, wherein the first backrest auxiliary component and the second backrest auxiliary component are respectively positioned on the rear portion and the front portion of the fixed frame; the first backrest auxiliary assembly comprises a sliding rail and a pulley, the sliding rail is convenient for the backrest assembly to incline and return, the pulley is arranged in the sliding rail, and the second backrest auxiliary assembly comprises an auxiliary connecting piece A, an auxiliary connecting piece B and an auxiliary connecting piece C which are convenient for the backrest assembly to incline and return and are hinged with each other.
The first backrest auxiliary assembly and the second backrest auxiliary assembly are convenient for the backrest assembly to incline and return, so that the backrest assembly can incline and return smoothly and labor-saving; for a low functional rack, because the height is reduced, unsmooth and labor-consuming recovery of a backrest and the like are often caused, so that auxiliary components are needed to help the operation, and for a non-electric functional rack, the auxiliary components can help the operation to be smooth and the tilting recovery to save labor; in addition, in order to enable the backrest assembly to better achieve the effects of smooth operation and labor saving in tilting and returning, the first backrest auxiliary assembly and the second backrest auxiliary assembly are respectively arranged at the front part and the rear part of the fixing frame, and force which is beneficial to tilting and returning of the backrest assembly is generated for the front part and the rear part.
Preferably, the slide rail is fixedly arranged at the rear part of the inner side of the fixed frame, the pulley is rotatably connected at the rear part of the lower cushion support piece, and the pulley is arranged in the slide rail and can slide along the slide rail.
Since the back assembly is generally disposed at the rear of the fixed leg, disposing the first back auxiliary assembly at the rear facilitates the reclining and restoring of the back assembly.
Preferably, the front track of the slide rail is an arc line, the rest tracks of the slide rail are straight lines or arc lines tending to be straight lines, and the slide rail is integrally inclined with a high front part and a high rear part.
The invention designs the composite guide rail of the rear linear part or the arc part which tends to be linear and the front arc part, when the backrest component tilts up and falls down, the height change of the pulley of the linear part or the arc part which tends to be linear is gentle in the initial stage, the resistance of the backrest component for tilting up and falling down is reduced, the backrest component is convenient to tilt up, the arc part accelerates the lifting height of the pulley, the gravity restoring force is increased, the smooth resetting of the backrest component is ensured, and therefore, the smoothness and labor saving of the tilting up and restoring of the backrest component are realized. To the reduction of function frame height, length extension after, the size of various connecting rods receives the restriction, the back subassembly is inclining the in-process of falling down, the height that the seat lifted reduces, can lead to the seat gravity restoring force not enough more easily, consequently, design rear portion straight line portion or tend to sharp pitch arc part, the compound guide rail of anterior pitch arc part, it is smooth and easy, laborsaving also very to be favorable to the back subassembly to incline to face upward and reply, to non-electric function frame, the same smooth and easy nature through the pulley slide rail brings smoothly, laborsaving effect for inclining and replying of back subassembly.
Preferably, the included angle between the straight line part or the arc line tending to the straight line of the slide rail and the horizontal plane is in the range of 11-18 degrees.
The design of the angle is directly related to the inclination degree of the straight line part or the arc line part which tends to be straight, the resistance of the backrest assembly to incline and incline can be reduced for the low functional frame, and the inclination of the backrest assembly can be facilitated, so that the smooth and labor-saving effects can be brought to the inclination and the return of the backrest assembly.
Preferably, the arc radius of the arc part at the front part of the slide rail is 40 mm-150 mm.
The design that the radius of the circular arc is 40 mm-150 mm directly relates to the degree of accelerating the lifting height of the pulley, and for a low functional frame, the gravity restoring force can be increased, the weightlessness possibly brought by tilting can be overcome, the smooth resetting of the backrest assembly is ensured, and therefore the smooth and labor-saving tilting and restoring of the backrest assembly are realized.
Preferably, the arc length of the arc part of the front part of the slide rail and the length ratio of the straight line part or the arc part which tends to be straight line of the rest part are 1/6-1/2.
The arrangement of the proportion realizes the effects of tilting and returning smoothly and labor-saving simultaneously.
Preferably, two ends of the sliding rail are provided with limiting devices for preventing the pulley from sliding out of the sliding rail.
The limiting device is used for preventing the pulley from sliding out of the sliding rail.
Preferably, the auxiliary connecting piece B is a crank structure which is provided with a bent part A and is provided with a forward opening; one ends of the auxiliary connecting piece A and the auxiliary connecting piece C are hinged with the inner side of the fixing frame on the same side, the other ends of the auxiliary connecting piece A and the auxiliary connecting piece C are respectively hinged with the upper end of the auxiliary connecting piece B and the bending part A of the auxiliary connecting piece B, and the other end of the auxiliary connecting piece B is hinged with the front part of the lower cushion supporting piece; the hinge point of the auxiliary connecting piece A and the fixing frame is located behind the hinge point of the auxiliary connecting piece C and the fixing frame, and the hinge point of the auxiliary connecting piece A and the auxiliary connecting piece B is located above the hinge point of the auxiliary connecting piece C and the fixing frame.
After the backrest component tilts up and falls down, the gravity center of a human body changes, most of the gravity is distributed at the front ends of the backrest and the seat surface, and accordingly the restoring force is insufficient.
Preferably, when the backrest assembly is completely tilted and falls down, a connecting line between a hinge point between the auxiliary connecting piece A and the auxiliary connecting piece B and a hinge point between the auxiliary connecting piece C and the auxiliary connecting piece B is a connecting line A, a connecting line between a hinge point between the auxiliary connecting piece C and the auxiliary connecting piece B and a hinge point between the auxiliary connecting piece C and the fixing frame is a connecting line B, and an included angle between the connecting line A and the connecting line B is less than 5 degrees; the connecting line of the hinge point between the auxiliary connecting piece A and the auxiliary connecting piece B and the hinge point between the auxiliary connecting piece C and the fixing frame is a connecting line C, and the included angle between the connecting line C and the vertical line is less than 10 degrees.
After the backrest component tilts up and falls down, the gravity center of a human body changes, and most of the gravity is distributed at the front ends of the backrest and the seat surface, so that the restoring force is insufficient; the data with the included angle of less than 5 degrees and less than 10 degrees are adopted, so that the generated restoring force is larger; meanwhile, the driving mechanism moves forwards, so that zero leaning against the wall of the seat is realized; all included angles described herein are acute included angles.
Preferably, the backrest assembly comprises a backrest connecting piece A, a backrest connecting piece B, a backrest connecting piece C, a backrest connecting piece D and a backrest connecting piece E, wherein the backrest connecting piece C is of a crank structure with a bent part B and a forward opening, and the backrest connecting piece D is an extending part which is inclined upwards and arranged at the rear part of the upper cushion support; two ends of the backrest connecting piece A are respectively hinged with one end of the backrest connecting piece B and the front part of the backrest connecting piece D; one end of the backrest connecting piece C is hinged with the middle part of the backrest connecting piece B, the other end of the backrest connecting piece C is hinged with one end of the backrest connecting piece E, the bending part B of the backrest connecting piece C is hinged with the tail end of the backrest connecting piece D, the other end of the backrest connecting piece E is hinged with the same-side fixing frame, and the backrest connecting piece A, the backrest connecting piece B, the backrest connecting piece C and the backrest connecting piece D form a four-link mechanism.
The backrest connecting piece E plays a role in supporting the four-bar linkage, supports the four-bar linkage which is inclined and falls down when the leg rest board assembly extends, plays a role in buffering, and pulls the four-bar linkage to prevent the four-bar linkage from falling down.
Preferably, the distance between two hinge points formed by hinging the backrest connecting piece A and the backrest connecting piece C with the backrest connecting piece B is 45-60 mm.
Because the height of the functional frame is reduced, the gravity center of a human body moves upwards, the force for falling down by tilting is insufficient, the stability is poor, the distance between the functional frame and the backrest is set to be moderate 45-60 mm, the backrest is more easily tilted down and the stability when falling down is improved, and the defects of labor wasting when tilting down due to too long distance and poor stability due to too short distance are avoided.
Preferably, a limit shaft A is arranged on the backrest connecting piece A, and the end, hinged with the backrest connecting piece A, of the backrest connecting piece B extends to form a limit rod; when the backrest component is in an initial state or only the leg rest plate component extends, the limiting rod is abutted against the limiting shaft A; when the backrest assembly 400 is completely tilted and falls down, the backrest connecting piece B is propped against the limiting shaft A.
This may improve the structural stability of the back assembly in either the unfolded or undeployed state.
The invention adopts the technical scheme, which has the beneficial effects that:
the invention provides a backrest inclining mechanism of a functional frame of a seat, which is suitable for the backrest components on different functional frames to run smoothly and laborsaving in the inclining, falling and returning processes, is convenient for the inclination, the inclination and the return of the backrest components and gives consideration to the change of the height of the backrest. The invention designs the composite guide rail of the rear linear part or the arc part which tends to be linear and the front arc part, when the backrest component tilts up and falls down, the height change of the pulley of the linear part or the arc part which tends to be linear is gentle in the initial stage, the resistance of the backrest component for tilting up and falling down is reduced, the backrest component is convenient to tilt up, the arc part accelerates the lifting height of the pulley, the gravity restoring force is increased, the smooth resetting of the backrest component is ensured, and therefore, the smoothness and labor saving of the tilting up and restoring of the backrest component are realized. Function frame height reduction, length extension after, the size of various connecting rods receives the restriction, the back subassembly is inclining the in-process of falling down, the height that the seat lifted reduces, can lead to seat gravity restoring force not enough more easily, consequently, design rear portion straight line portion or tend to sharp pitch arc part, the compound guide rail of anterior pitch arc part, it is smooth and easy that also very be favorable to the back subassembly to incline to face and reply, laborsaving, to non-electric function frame, the smooth and easy nature of the same through the pulley slide rail brings smoothly, laborsaving effect for inclining and replying of back subassembly.
Drawings
FIG. 1 is a schematic view of the overall structure of the fixing frame and the internal components of the present embodiment;
FIG. 2 is a schematic structural view of a portion of the fixing frame and the internal components of the present embodiment;
FIG. 3 is a schematic structural view of another portion of the fixing frame and the internal components of the present embodiment;
FIG. 4 is a schematic side view of the structure of FIG. 2;
FIG. 5 is a side elevational view of the backrest module of FIG. 2 fully reclined;
fig. 6 is an enlarged schematic view of a portion a in fig. 5.
Detailed Description
The specific embodiment of the invention is as follows:
in the present embodiment, the directional words such as "front", "rear", "left", "right", etc. are described in terms of the user's view after sitting on the seat, for example, the front of the user is "front"; for better understanding of the present embodiment, the related connecting lines a, B, and C are virtual lines.
Example (b):
a backrest leaning mechanism of a functional seat frame, as shown in fig. 1-3, comprises a first backrest auxiliary component 510 and a second backrest auxiliary component 520, which are arranged on the left and right sides of a fixed frame 100 and are arranged in bilateral symmetry, wherein the first backrest auxiliary component 510 and the second backrest auxiliary component 520 are respectively arranged at the rear part and the front part of the fixed frame 100; the first backrest auxiliary unit 510 includes a sliding rail 511 for facilitating the tilting and returning of the backrest unit 400 and a pulley 512 provided in the sliding rail 511, and the second backrest auxiliary unit 520 includes an auxiliary link a521, an auxiliary link B522 and an auxiliary link C523, which are hingedly connected to each other for facilitating the tilting and returning of the backrest unit 400.
As shown in fig. 1-4, the slide rail 511 is fixedly disposed at the rear portion of the inner side of the fixed frame 100, the pulley 512 is rotatably connected to the rear portion of the lower cushion support 320, and the pulley 512 is disposed in the slide rail 511 and can slide along the slide rail 511; limiting devices for preventing the pulley 512 from sliding out of the sliding rail 511 are arranged at two ends of the sliding rail 511; the front track of the sliding rail 511 is an arc 5111, the rest track of the sliding rail 511 is a straight line 5112, and the sliding rail 511 is integrally inclined with a high front part and a high rear part; the pulley 512 is made of plastic or microstrip elastic material, and the sliding rail 511 is made of metal material; more specifically, in the case of a functional rack having a short height, in which the vertical distance between the reference plane of the seat cushion support member 300 and the lowest point of the functional rack is 174mm, except for the back rest member 400 at the rear, it is effective and advantageous to tilt the back rest member to the rest position by performing a great effort test on such a functional rack, specifically, the angle between the straight line 5112 portion of the slide rail 511 and the horizontal plane is 15 °, the arc radius of the arc 5111 portion of the front portion of the slide rail 511 is 60mm, and the ratio of the arc length of the arc 5111 portion of the front portion of the slide rail 511 to the length of the straight line 5112 portion of the remaining portion thereof is 1/4.
As shown in fig. 2 to 6, the second backrest auxiliary assembly 520 includes an auxiliary connecting member a521, an auxiliary connecting member B522 and an auxiliary connecting member C523, wherein the auxiliary connecting member B522 has a crank structure with a bent portion a5221 and a forward opening; one ends of the auxiliary connecting piece A521 and the auxiliary connecting piece C523 are hinged with the inner side of the same-side fixing frame 100, the other ends of the auxiliary connecting piece A521 and the auxiliary connecting piece C523 are respectively hinged with the upper end of the auxiliary connecting piece B522 and a bent part A5221 thereof, and the other end of the auxiliary connecting piece B522 is hinged with the front part of the lower cushion support 320; the hinge point of the auxiliary connecting element a5221 and the fixing frame 100 is located behind the hinge point of the auxiliary connecting element C523 and the fixing frame 100, and the hinge point of the auxiliary connecting element a521 and the auxiliary connecting element B522 is located above the hinge point of the auxiliary connecting element C523 and the fixing frame 100.
As shown in fig. 5-6, when the backrest module 400 is completely reclined and falls, a connection line between the hinge point between the auxiliary link a521 and the auxiliary link B522 and the hinge point between the auxiliary link C523 and the auxiliary link B522 is a connection line a524, a connection line between the hinge point between the auxiliary link C523 and the auxiliary link B522 and the hinge point between the auxiliary link C523 and the fixed frame 100 is a connection line B525, and an included angle between the connection line a524 and the connection line B525 is 4 °; a connecting line between the hinge point between the auxiliary connecting element a521 and the auxiliary connecting element B522 and the hinge point between the auxiliary connecting element C523 and the fixing frame 100 is a connecting line C526, and an included angle between the connecting line C526 and the vertical perpendicular line 527 is 9 °.
More specifically, as shown in fig. 1, 2 and 4, the backrest assembly 400 includes a backrest connecting member a410, a backrest connecting member B420, a backrest connecting member C430, a backrest connecting member D440 and a backrest connecting member E450, wherein the backrest connecting member C430 has a crank structure with a bent portion B431 and a forward opening, and the backrest connecting member D440 is an extension of the upper cushion support 310 which is inclined upward and inclined upward at the rear portion thereof; two ends of the backrest connecting piece A410 are respectively hinged with one end of the backrest connecting piece B420 and the front part of the backrest connecting piece D440; one end of the backrest connecting piece C430 is hinged with the middle part of the backrest connecting piece B420, the other end of the backrest connecting piece C430 is hinged with one end of the backrest connecting piece E450, the bent part B431 of the backrest connecting piece C is hinged with the tail end of the backrest connecting piece D440, the other end of the backrest connecting piece E450 is hinged with the same-side fixing frame 100, and the backrest connecting piece A410, the backrest connecting piece B420, the backrest connecting piece C430 and the backrest connecting piece D440 form a four-bar linkage; the distance between two hinge points formed by the backrest connecting piece A410 and the backrest connecting piece C430 respectively hinged with the backrest connecting piece B420 is 49.5 mm.
As shown in fig. 2, 4 and 5, in order to improve the structural stability of the backrest module in the unfolded or non-unfolded state, a limiting shaft a411 is provided on the backrest connecting member a410, and a limiting rod 421 is formed on the backrest connecting member B420 by extending from the end hinged to the backrest connecting member a 410; when the backrest assembly 400 is in the initial state or only the leg rest assembly 200 is extended, the limit rod 421 abuts against the limit shaft A411; when the backrest module 400 is fully tilted and falls down, the backrest connecting member B420 abuts against the limiting shaft a 411.
The operation process of the mechanism is as follows:
when gravity presses on the backrest connector B420, the four-bar linkage composed of the backrest connector B420, the backrest connector A410, the backrest connector C430 and the backrest connector D440 and the backrest connector E450 move forwards and downwards, the pulley 512 slides forwards and upwards along the sliding rail 511 (the height change of the part of the pulley 512 of the straight line 5112 is gentle, so that the resistance of the backrest assembly 400 to tilt and fall is reduced, and the backrest assembly 400 is convenient to tilt), and the second backrest auxiliary assembly 520 moves forwards at the same time; when the backrest is restored, the four-bar linkage composed of the backrest connector B420, the backrest connector a410, the backrest connector C430 and the backrest connector D440 and the backrest connector E450 move backward and upward, the pulley 512 slides backward and downward along the slide rail 511 (the arc 5111 accelerates the lifting height of the pulley 512, increases the gravity restoring force, and ensures the backrest assembly 400 to be smoothly restored, thereby realizing the smooth and labor-saving tilting and restoring of the backrest assembly 400), and the second backrest auxiliary assembly 520 moves backward at the same time.
The invention realizes the effects of smooth operation of the low functional frame, labor saving of tilting and returning and adaptation to the height change of the backrest.
Claims (12)
1. The utility model provides a back of seat function frame mechanism of inclining which characterized in that: the backrest comprises a first backrest auxiliary component (510) and a second backrest auxiliary component (520) which are arranged on the left side and the right side of a fixing frame (100) and are arranged in a bilateral symmetry mode, wherein the first backrest auxiliary component (510) and the second backrest auxiliary component (520) are respectively positioned on the rear portion and the front portion of the fixing frame (100); the first backrest auxiliary assembly (510) comprises a sliding rail (511) for facilitating the inclination and return of the backrest assembly (400) and a pulley (512) arranged in the sliding rail (511), and the second backrest auxiliary assembly (520) comprises an auxiliary connecting piece A (521), an auxiliary connecting piece B (522) and an auxiliary connecting piece C (523) which are hinged with each other for facilitating the inclination and return of the backrest assembly (400).
2. The backrest recline mechanism of a seat functional rack as claimed in claim 1, wherein: the sliding rail (511) is fixedly arranged at the rear part of the inner side of the fixed frame (100), the pulley (512) is rotatably connected at the rear part of the lower cushion support (320), and the pulley (512) is arranged in the sliding rail (511) and can slide along the sliding rail (511).
3. The backrest recline mechanism of a seat functional rack as claimed in claim 2, wherein: the front track of the sliding rail (511) is an arc line (5111), the rest part of the track of the sliding rail (511) is a straight line (5112) or an arc line tending to a straight line, and the sliding rail (511) is integrally inclined with a high front part and a high rear part.
4. The backrest recline mechanism of a seat functional rack as claimed in claim 3, wherein: the included angle range of the straight line (5112) part or the arc line tending to the straight line of the slide rail (511) and the horizontal plane is 11-18 degrees.
5. The backrest recline mechanism of a seat functional rack as claimed in claim 3, wherein: the arc radius of the arc line (5111) at the front part of the sliding rail (511) is 40-150 mm.
6. The backrest recline mechanism of a seat functional rack as claimed in claim 3, wherein: the length ratio of the arc length of the arc line (5111) part at the front part of the slide rail (511) to the length of the straight line (5112) part or the arc line part tending to the straight line is 1/6-1/2.
7. The backrest recline mechanism of a seat functional rack as claimed in claim 2, wherein: and limiting devices (513) used for preventing the pulleys (512) from sliding out of the sliding rails (511) are arranged at two ends of the sliding rails (511).
8. The backrest recline mechanism of a seat functional rack as claimed in claim 1, wherein: the auxiliary connecting piece B (522) is of a crank structure with a bent part A (5221) and a forward opening; one ends of the auxiliary connecting piece A (521) and the auxiliary connecting piece C (523) are hinged with the inner side of the same-side fixing frame (100), the other ends of the auxiliary connecting piece A (521) and the auxiliary connecting piece C (523) are respectively hinged with the upper end of the auxiliary connecting piece B (522) and a bending part A (5221) of the auxiliary connecting piece B, and the other end of the auxiliary connecting piece B (522) is hinged with the front part of the lower cushion support piece (320); the hinge point of the auxiliary connecting piece A (5221) and the fixed frame (100) is positioned behind the hinge point of the auxiliary connecting piece C (523) and the fixed frame (100), and the hinge point of the auxiliary connecting piece A (521) and the auxiliary connecting piece B (522) is positioned above the hinge point of the auxiliary connecting piece C (523) and the fixed frame (100).
9. The backrest recline mechanism of a seat functional rack as claimed in claim 8, wherein: when the backrest assembly (400) is completely tilted and falls down, a connecting line between a hinge point between the auxiliary connecting piece A (521) and the auxiliary connecting piece B (522) and a hinge point between the auxiliary connecting piece C (523) and the auxiliary connecting piece B (522) is a connecting line A (524), a connecting line between a hinge point between the auxiliary connecting piece C (523) and the auxiliary connecting piece B (522) and a connecting line between a hinge point between the auxiliary connecting piece C (523) and the fixing frame (100) is a connecting line B (525), and an included angle between the connecting line A (524) and the connecting line B (525) is less than 5 degrees; the connecting line of the hinge point between the auxiliary connecting piece A (521) and the auxiliary connecting piece B (522) and the hinge point between the auxiliary connecting piece C (523) and the fixed frame (100) is a connecting line C (526), and the included angle between the connecting line C (526) and the vertical perpendicular line (527) is less than 10 degrees.
10. The backrest recline mechanism of a seat functional rack as claimed in claim 9, wherein: the backrest assembly (400) comprises a backrest connecting piece A (410), a backrest connecting piece B (420), a backrest connecting piece C (430), a backrest connecting piece D (440) and a backrest connecting piece E (450), wherein the backrest connecting piece C (430) is of a crank structure with a bent part B (431) and a forward opening, and the backrest connecting piece D (440) is an extending part which is inclined upwards at the rear part of the upper cushion support (310); two ends of the backrest connecting piece A (410) are respectively hinged with one end of the backrest connecting piece B (420) and the front part of the backrest connecting piece D (440); one end of the backrest connecting piece C (430) is hinged with the middle part of the backrest connecting piece B (420), the other end of the backrest connecting piece C is hinged with one end of the backrest connecting piece E (450), the bending part B (431) of the backrest connecting piece C is hinged with the tail end of the backrest connecting piece D (440), the other end of the backrest connecting piece E (450) is hinged with the same-side fixing frame (100), and the backrest connecting piece A (410), the backrest connecting piece B (420), the backrest connecting piece C (430) and the backrest connecting piece D (440) form a four-bar linkage mechanism.
11. The backrest recline mechanism of a seat frame as claimed in claim 10, wherein: the distance between two hinge points formed by hinging the backrest connecting piece A (410) and the backrest connecting piece C (430) with the backrest connecting piece B (420) is 45-60 mm.
12. The backrest recline mechanism of a seat frame as claimed in claim 10, wherein: a limit shaft A (411) is arranged on the backrest connecting piece A (410), and the end hinged with the backrest connecting piece A (410) on the backrest connecting piece B (420) extends to form a limit rod (421); when the backrest assembly (400) is in an initial state or only the leg rest plate assembly (200) is extended, the limiting rod (421) is abutted against the limiting shaft A (411); when the backrest assembly (400) is completely tilted and falls down, the backrest connecting piece B (420) is propped against the limiting shaft A (411).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810619674.8A CN110604414A (en) | 2018-06-15 | 2018-06-15 | Backrest inclining mechanism of seat functional frame |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810619674.8A CN110604414A (en) | 2018-06-15 | 2018-06-15 | Backrest inclining mechanism of seat functional frame |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110604414A true CN110604414A (en) | 2019-12-24 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810619674.8A Pending CN110604414A (en) | 2018-06-15 | 2018-06-15 | Backrest inclining mechanism of seat functional frame |
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| Country | Link |
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| CN (1) | CN110604414A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103549787A (en) * | 2013-09-24 | 2014-02-05 | 鲍月娥 | Seat and backrest installation structure |
| CN203555400U (en) * | 2013-09-23 | 2014-04-23 | 傅建华 | Chair and functional rack thereof |
| CN104856478A (en) * | 2015-03-27 | 2015-08-26 | 浙江永艺家具股份有限公司 | Chair and electro-mechanical stretching apparatus thereof |
| CN204635615U (en) * | 2015-03-27 | 2015-09-16 | 浙江永艺家具股份有限公司 | A kind of seat and electromechanical extension device thereof |
| CN106473490A (en) * | 2015-09-02 | 2017-03-08 | 安吉上工永艺五金制造有限公司 | A kind of seat and its functional frame |
| CN209090453U (en) * | 2018-06-15 | 2019-07-12 | 永艺家具股份有限公司 | A kind of backrest tilting mechanism of functions of seat frame |
-
2018
- 2018-06-15 CN CN201810619674.8A patent/CN110604414A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203555400U (en) * | 2013-09-23 | 2014-04-23 | 傅建华 | Chair and functional rack thereof |
| CN103549787A (en) * | 2013-09-24 | 2014-02-05 | 鲍月娥 | Seat and backrest installation structure |
| CN104856478A (en) * | 2015-03-27 | 2015-08-26 | 浙江永艺家具股份有限公司 | Chair and electro-mechanical stretching apparatus thereof |
| CN204635615U (en) * | 2015-03-27 | 2015-09-16 | 浙江永艺家具股份有限公司 | A kind of seat and electromechanical extension device thereof |
| CN106473490A (en) * | 2015-09-02 | 2017-03-08 | 安吉上工永艺五金制造有限公司 | A kind of seat and its functional frame |
| CN209090453U (en) * | 2018-06-15 | 2019-07-12 | 永艺家具股份有限公司 | A kind of backrest tilting mechanism of functions of seat frame |
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